Brush-holder.



PATBNTBD MAY 19 H. GEISENHONER.

BRUSH HOLDER.

APPLICATION FILED DEQ. 20, 1900.

H0 IODEL.

Jnventorf HenryGeisenhnerw WflmesSes.

WMQM

Atty,

' UNITED STATES Patented May 19, 1903.

PATENT OFFICE.

HENRY GEISENIIONER, OF SCHENEOTADY, NEYV YORK, ASSIGNOR TO GEN- ERAL ELECTRIC COMPANY, A CORPORATION OF NEYV YORK.

BRUSH-HOLDER.

SPECIFICATION forming part of Letters Patent No. 728,565, dated May 19, 1903. Application filed December 20,1900. Serial No. 40510. (No model.)

To all whom it mug concern:

Be it known that I, HENRY GEISENHONER, a citizen of the United States, residing at Schenectady, county of Schenectady, State of New York, have invented certain new and useful Improvements in Brush-Holders, of. which the following is a specification.

Thisinvention relates to improvements in brush-holders for electric machines, whereby 0 not only a cheap and efficient structure is provided, but also means for furnishing a path for the current from the brush independently of its spring,which dispenses,when desired, with the flexible connection-generally attached to the brush. I

Of the drawings, Figure 1v is aside elevation of the brush-holder and attachments embodying theinvention. of the same. Fig. 3 is a detail perspective view of a part, and Fig. 4. is a side elevation of a part of the brush-holder structure.

U represents aguide-box for the brush, and is a helical spring which bears on thetop of the brush to force it against the commuiator of the machine. The turns of the upper end of" the helical spring S are retained by a screw-threaded portion E of an adjusting device A. wine is SCI'O\\'-llllUittl0Ll and passes freely r tl-rough the hole I, Fig. 53, in an angular por- Lion G of a lcaf-spring or resilient arm L. This spring L is provided with a pivotpin l, which engages in an opening X, formed by a hook T, which extends downwardly from the holder K. A nut W works on the'screw- 'threadcd portion .D of the adjusting device A and is located beneath the angular portion (1 of the leaf-spring L. The helical spring S is adjusted as desired by turning 40 the nut \V. Alower depression 11 is formed in the angular l andis adapted for the reception of a projection l of the nut W in order to retain the nut in a position to which it has been turned 5 and prevent it being jarred loose by the vibration of the machine. The lower and serrated portion N of the leaf-spring L bears against the brush 13 to force it into intimate contact with the side M of the box U, thereby 5o alter-ding a gU'Jh l conducting path for the current from the brush directly to the holder K .the box U, as described above.

Fig. 2 is a plan view The upper portion of the de-' portion G of the leaf-spring without passing through the spring S, the resiliency of which would be seriously aifected if a considerable partof the current passed through it. When the nut XV is turned so that the springS presses the brush B suitably against the commutator, the spring S will exert also an upward pressure against the angular portion G of the spring L, and as the spring-L is pivoted at P its lower portion will press the brush-B against the side M of It is evident that the angular portion G will codperat-e with the spring S to press the brush against the commutator, and this feature is of especial importancein forcing the brush quickly back against the commutator in case it is forced upward by a high commutator-bar. In such a case the helical spring S is compressed, aud the angular portionG is moved 7o upward, so that as soon as the high bar passes from beneath the brush the portion G forces the brush down hard upon the normal surface of the commutator. It will be seen that v the arrangement of parts is such that the '75 pressure of the pivot-spring L, while sufficiently great to provide good contact from the brush to the side of the box U, is not sufficient to interfere with the downward pressure on the brush, so that as the brush wears away by the action of the commutator it can move down readily to be kept in constant contact with the latter. So far as the pressure of the brush against the side U of the holder is concerned the spring L might be replaced by a rigid structure; but the resiliency of the part L not only aids the spring S, but permits the lower portion N of part L, which engages the side of the brush, to be independently movable. The entire arrange- 9o ment is such as to equalize all strains to which it is subjected. On'the other hand, the angular portion G might be adapted to alone press the brush againstthe commutator and yet be within the limits of the invention.

A further important feature of the invention is the arrangement whereby the brush can be removed from the holder without altering the tension of the spring S, which feature is extremely desirable, as unskilled persons are required to frequently replace the brushes, and it is important that the tension shoulder Z.

the enteusion O and'are adapted to embrace f VHIHHHHH ot the springbe kept constant. This is accomplished in the following manner: The .up-

- compressed; and the pivot-pin P is forced out of the hole X under the hook T and along the edge Yof the hook; which makes the device free, so that it can be entirely removed from the holder. The brush B isnow free and can be readily removed from the'box U. Furthermore, as the screw D fits loosely'in thev .spring'which presses the brush against the commutator, a spring which presses the brush hole I in the angular portion Got the spring L thesev separate parts can be easily replaced is by new ones. 7 v p A furthe'r'important improvement is-the construction of theholder K, the mainjportion of which-is formed of a single strip-of sheet metal, as shown-in Fig. 2, punched to the required shape from a shee'tof metal, and

thenhentinto thefinal'shape. This punched strip 'cdni'prises two connected parts like that shown inelevation in Fig. with'the holes 0, by means of which the holder is mounted upon a suitable standard or stud, and the-hookv T for the pivot-pin P. The strip is bent in the proper shape to formthe box or guide U and the two sides I K. These sides are connected by pins or rivets Q and interposed sleeves Q, mounted on the pins. It should be noted that a space U, Fig. 2', is formed between the guide U and the holder. In this space is located the device L. The clamping-piece I C, by which the holder K islmountedpn the stud, is shown-in detail. in Fig. 4 and comprises a split ring of-a width equalto the fdistance of the sides K of the holder K, A hole Olis formed in the clamp .0, of the same diameter as the holeO of the holder K for therece'ption of the support or stud. FiojectionsG extend from the clamp G and areprovided with screw-threaded openings V and a countersunk portion Z for the reception of the clamping-screw'J and its Grooves Q are also formed in thesleeve Q, which surrounds the pin Q, joining the sides K of the holder What I claim as new, and desire to sec ire by Letters Patent of the United States, is+- 1. The combination with a holder provided with a brush-box, andan opening from the .box to a space between the sides of the holder,

said opening being narrower than the bo x,'of a de'viceextending through the opening to a press thebrush against the box. 2.'The combination withna holder, of aspring which presses the brush against the commutatonan-d a spring which presses the brush against the holder and the commutator.

. 3. The combination with a holder, Man angular spring, one end of which engages the brush to press it against the holder and the other end of whieh operates to force the brush against the commutator.

4. The combination with a holder, ofa and whichgcoop'erate 1 and provided I 14. Thecombinationwith WU l WW spring which engages the brush. to presszit against the commutator, and a device. which carries thespring and which is forced by the spring to pressthe brush against the'holder.

5. The combination with. a holder, of a spring which engages the brush to press it against the commutator, and a resilient spring-carrying-device;which is forced by the spring to press the brush against the holder, with the spring to press the brushagainst the commutator,

6. The combination with a holder, of a againstth e'holder, and ade'vice for adjusting both .springssimultaneously.

7. The combination with a holder, oftwo interacting springs, which press the brush against the commutator and; theholdermespectively.

8. 'Theco'mbin-ation with a holder, of'a leafspring: mounted-thereon to press the brush against the holder, and a helical spring supported by the leaf-spring, to press the brush against thecommutator, and to press the leafspring against the brush.

v 9. The combination with a holder, of a leafspring pivoted to the holder, to press the brush against the holder, and ahelical spring sup; ported by the leaf-spring to press the'brush against the commutator and the leaf-spring against the brush.

presses the brush against the holder, its other 'end being adapted to press the brush against the commutator, and means.for varying the tension of the spring.

11. The combination witha holder, of a spring removably mounted in the holder to press the brnshagaiustthe holder, and-a second spring supported by said spring to press 'the'brush against the commutator,

press said spring against the brush.

12. The combination with .a, holder provided with a downwardly-extendin g hook, of a spring removably pivoted in the hook,to press the brush against'the holder, and-a second spring which resses the brush against the commutator, which second spring also presses said spring against the brush.

1.3. The combination with a holder, of a springivoted thereto to press the brush against the'holder, said spring having an angular portion; and a spring acting between the brush and said angular portion.

a holder, of a springpivoted thereto, to press the brush against the holder, said spring being provided with an angular portion; a screw freely movable through a perforation'in said, angular portion, a spring mounted on the screw to press the-brush against the commutator, and

a nut engaging the screw and the lower side of the angular portion ofthe first spring, for

adjusting said springs.

The combination with a holder,of an an gular spring pivoted therein so that one'end and vto- 15. The combination with a holder, of a spring-carrying device mounted thereon, a

screw freely extending through a perforation spring.

16. The combination with a holder, of a spring independent of the holder, which presses the brush against the commutator, and a'device whichis pressed against the brush by the spring, to press the brush against the holder.

17. The combination with a holder, of a spring which engages the brush to press it' against the commutator, and a device which is pressed against the brush by the spring, to press the brush against the holder.

18. The combination with a holder, of a spring which continuously presses the brush against the commutator, and a second spring which cooperates therewith, to quickly force the brush back against the com mutator when the brush is raised by a high commutator bar.

19. The combination with a' holder, of a helical spring the lower end of which engages the.brush to press it against the commutator, and a device which is pivoted to the holder, the upper end'of which device operates to retain the upper end of said spring, to force the. lower end of the device against the brush, to press the brush against the holder.

20. A brush-holder, which comprises two relatively thin sides provided with perforations whereby the holder. is adapted to be mounted on a suitable support; and located between these sides, a clamp to lend rigidity to the sides and to secure the holder to the support.

21. A brush-holder,which comprises a main portion or holder consisting of a single sheetmetal punching which has been bent into shape to formthe box and'two sides of the holder, and located between these sides, a clamp to lend rigidity to the sides and 'to secure the holder to a suitable support.

22. A brush-holder, whiclrcomprises the main portion or holder consisting of a single sheet of metal, which has been punched with holes, whereby it can be mounted on a suitable support, and with two hooks, and bent into shape to form the box and-two sides,

each side'having a hole and a hook'in alinement, and located between these sides a clamp to lend rigidity to the sides and secure the holder tothe support.

23.'A brush-holder,-which comprises two relatively thin sides perforated to be mounted on a suitable support and connected togetherby strengthening rods; and, arranged between the sides, a clamp which embraces the support and one strengthening-rod.

24:. The combination with a holder, of a spring, one end of which engages the brushto press it against the commutator, andadevice which is forced by the other end of the spring to press the brush against the holder..

25. A holderfor brushes, which comprises a single sheet-metal punching which has been bent into shape to form the brush-boxand two sides of the holder, with a free opening between the interior of the box and the sides of the holder.

i 26. The combination with a holdergof a.

spring'wh ich bears on the top of the brush to press it against the commutator, and a device which is pivoted to the holder, and is forced by the spring against the side of the brush, to press the brush against the holder.

27. The combination with a holder, of a helical spring which bears on the brush, and a leaf-spring which cooperates with the helical spring and bears on the brush.

28. The combination with a holder, of two .springs, each of which operates to force the brush against the commutator and the holder. 29. The combination with a holder, of a spring which bears on the brush to press it against the commutator, and a spring which, bears against the brush to press it against the holder, said springs cooperating so that either assists the other.

30. The combination with a holder of a helical spring which engages the brush to press it against the commutator, and a device which is forced by said helical spring to press the brush against the holder.

31. The combination with a holder, of a device for pressing the brush against the commutator, a separate device for pressing the brush against the holder, and means for simultaneously varying the pressure exerted upon the brush by said devices.

' In witness whereof I have hereunto set my handthis 15th day of December, 1990.

HENRY GEISENHONER. Witnesses:

' BENJAMIN B. HULL,

MARGARET E. WOOL-LEY. 

